The "Two and a Half Men" star pleaded guilty in an Aspen, Colo. courtroom to misdemeanor assault Monday in exchange for dropping two other charges -- including felony menacing -- that stem from a Christmas Day incident with Sheen's wife, The Associated Press reported.

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He was ordered to report to a California rehabilitation center in a month to begin serving a 30-day sentence, followed by as many days on probation and 36 hours of anger management, according to the AP.

The sentence allows Sheen to begin filming the new season of his hit CBS sitcom on set in Los Angeles tomorrow, TMZ reported.

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Sheen, 44, was arrested on Christmas Day after his wife, Brooke Mueller, told cops in Aspen he threatened her with a knife at their vacation home.

Mueller told police Sheen held a switchblade knife to her throat as he held her down on her bed.

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"You better be in fear," the police report alleged Sheen told his wife. "If you tell anybody, I'll kill you. Your mother's money means nothing. I have ex-police I can hire who know how to get the job done and they won't leave any trace."

An Aspen police officer wrote that he saw "red marks on the upper part of the front of her neck."

Sheen denied attacking his wife, but admitted breaking her glasses, the police report said. Sheen told police he became angry when his wife threatened to divorce him and fight for custody of their twin sons, the report said.

Besides felony menacing, Aspen police originally charged Sheen with felony second-degree assault and a misdemeanor charge of criminal mischief. He was booked under his birth name, Carlos Irwin Estevez.

Both Sheen and Mueller, 32, entered substance abuse rehabilitation several weeks after the incident and have reconciled.

Celebrity lawyer Gloria Allred, who signed on to represent a former Aspen cop who responded to to the incident, reportedly blasted Monday's plea deal.

"The sentence was absolutely laughable and unacceptable," Allred told the AP. "Spousal assault and battery is a very serious crime and needs to have serious consequences."

With Sheen's lawyers believed to be negotiating up to the last minute with prosecutors, Monday's deal differed from the one that fell apart in June.

Under that deal, Sheen would have served 30 days in Aspen's jail, but work by day as an intern at the town's community theater group.

"Sometimes people have the best intentions and the stars just don't align and you have to pull the plug and regroup," attorney Yale Galanter said.

Sheen and Mueller were married in 2008. Their twin sons, Max and Bob, celebrated their first birthday in March.